Labor costs (across the supply chain) have gone up. People argue for paying a sustainable wage (and I totally agree) but people don't seem to realize that prices will go up. If we used to pay someone $8/ hour to make 100 widgets, that's 12.5¢ per widget labor. If we now pay them $16/hour to make 100 widgets, that's 25¢ per widget labor. That more expensive widget goes to the next step in the supply chain as a more expensive input and labor at that step is also higher. And so on.
And then we scream "INFLATION" as if it is a surprise. Come on folks, take an Econ 101 class!